diff --git a/api/core/rag/extractor/helpers.py b/api/core/rag/extractor/helpers.py
index fcaad74e39..3d2fb55d9a 100644
--- a/api/core/rag/extractor/helpers.py
+++ b/api/core/rag/extractor/helpers.py
@@ -1,7 +1,6 @@
 """Document loader helpers."""
 
 import concurrent.futures
-import os
 from typing import NamedTuple, Optional, cast
 
 
diff --git a/api/core/rag/extractor/text_extractor.py b/api/core/rag/extractor/text_extractor.py
index a2dcf0a7bf..a00d328cb1 100644
--- a/api/core/rag/extractor/text_extractor.py
+++ b/api/core/rag/extractor/text_extractor.py
@@ -38,14 +38,10 @@ class TextExtractor(BaseExtractor):
                         continue
                 else:
                     raise RuntimeError(
-                        f"Decode failed: {self._file_path}, all detected encodings failed. "
-                        f"Original error: {e}"
+                        f"Decode failed: {self._file_path}, all detected encodings failed. Original error: {e}"
                     )
             else:
-                raise RuntimeError(
-                    f"Decode failed: {self._file_path}, specified encoding failed. "
-                    f"Original error: {e}"
-                )
+                raise RuntimeError(f"Decode failed: {self._file_path}, specified encoding failed. Original error: {e}")
         except Exception as e:
             raise RuntimeError(f"Error loading {self._file_path}") from e